(Auditing course) please help i didnt understand the effects on the fair presentation

Regarding the given cases, please choose the threat on the auditor's independence and its impact on the fair presentation of the financial statements. 1. Due to a shortage of personnel, the client asks a member firm to assist with the authorization of accounting transactions Type of Threat Effect on the Fair Presentation 2. It becomes obvious that a member of a CPA firm has developed a close relationship with an attest client. Type of Threat Effect on the Fair Presentation 3. An attest client threatens the member with not awarding future additional engagements to the firm if the firm does not agree with the client on a particular accounting matter. Type of Threat Effect on the Fair Presentation 4. A member actively endorses an attest client's products or services. Type of Threat Effect on the Fair Presentation